When I read the reviews on the Canon G11, nobody and I mean NOBODY mentioned the horrible lens distortion that the 6mm setting puts into the image. Worse, nobody mentioned that even in mid setting, there is a pin cushion effect, subtle but there regardless. Why did I see all this and not anyone else? Do I have the all seeing eye? Not so much but I AM shooting exclusively RAW which was one of the prime reasons I bought the camera. It turns out that in JPEG mode or in Automatic, the camera applies filters and corrections to fix all this but in RAW, you are pretty much on your own.
What I found out recently is that Lightroom under Camera Profiles Lens Corrections, you can fix alot of this type of problem for many cameras. If I were Adobe, I would be shooting this from the mountain tops and not keep it hidden. In the case of the G11, I can pick Canon G10 (pretty much the same camera) and LR will fix virtually all the distortion cleanly and fast.
See the image below for a side by side of before and after.
This is image is not retouched in any way other than the camera profile and whatever sharpening was applied in the conversion to JPEG from RAW in Lightroom.
But that is not all folks, you can have access to transforms from within Lightroom!! No more having to leave LR to go into Photoshop to use transforms. Check out this second panel in the Camera Profile panel.
And there is one more feature. Take a look at the next picture and you will see a grey background where I have transformed the image onto an angle which leaves a blank area. Instead of having to manually crop this, you have the option of clicking on the tick box to constrain the image as you go. This keeps the image cropped while you work. You can always go back and adjust to taste just like any other crop setting.
I hope this tip helps you as much as it did me. Even my good glass from Nikon benefited at times from the automatic corrections. Not nearly to the degree of the Canon but then the glass cost fours times as much as the Canon cost 🙂 You expect better from something that costly.